This method had been tested by many people. One of the best methods to stop cough.
Cut off the top part of the orange, put some salt into the orange, and put back the top part. Steam it 10 minutes and eat all the fresh including the juice at the bottom of the bowl. Taste not very nice but cures your prolonged cough in days.
Cut off a little shelf of top.
Add ¦ teaspoon of salt
Place in a bowl and steam it 20 minute
Don't forget to finish the water left in the bowl. Its taste sour and salty, good for cure.